Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L5/00—Arrangements affording multiple use of the transmission path
  • H04L5/0001—Arrangements for dividing the transmission path
  • H04L5/0003—Two-dimensional division
  • H04L5/0005—Time-frequency
  • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W74/00—Wireless channel access
  • H04W74/002—Transmission of channel access control information
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L47/00—Traffic control in data switching networks
  • H04L47/70—Admission control; Resource allocation
  • H04L47/72—Admission control; Resource allocation using reservation actions during connection setup
  • H04L47/726—Reserving resources in multiple paths to be used simultaneously
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L47/00—Traffic control in data switching networks
  • H04L47/70—Admission control; Resource allocation
  • H04L47/82—Miscellaneous aspects
  • H04L47/824—Applicable to portable or mobile terminals
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L5/00—Arrangements affording multiple use of the transmission path
  • H04L5/003—Arrangements for allocating sub-channels of the transmission path
  • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L5/00—Arrangements affording multiple use of the transmission path
  • H04L5/003—Arrangements for allocating sub-channels of the transmission path
  • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
  • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L5/00—Arrangements affording multiple use of the transmission path
  • H04L5/003—Arrangements for allocating sub-channels of the transmission path
  • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L5/00—Arrangements affording multiple use of the transmission path
  • H04L5/003—Arrangements for allocating sub-channels of the transmission path
  • H04L5/0078—Timing of allocation
  • H04L5/0082—Timing of allocation at predetermined intervals
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W56/00—Synchronisation arrangements
  • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
  • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W72/00—Local resource management
  • H04W72/04—Wireless resource allocation
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W72/00—Local resource management
  • H04W72/04—Wireless resource allocation
  • H04W72/044—Wireless resource allocation based on the type of the allocated resource
  • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W74/00—Wireless channel access
  • H04W74/002—Transmission of channel access control information
  • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W74/00—Wireless channel access
  • H04W74/08—Non-scheduled access, e.g. ALOHA
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W74/00—Wireless channel access
  • H04W74/08—Non-scheduled access, e.g. ALOHA
  • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

• the present invention relates to the field of communications technologies, and in particular, to a resource configuration method and an apparatus.
• downlink synchronization and uplink synchronization need to be performed before a network device and a terminal device communicate with each other.
• the network device sends a downlink synchronization signal using a plurality of transmit beams, and the terminal device receives and detects the downlink synchronization signal using one or more receive beams, to obtain an optimum downlink transmit beam and receive beam pair, a time, and system information.
• Uplink synchronization is implemented by using a random access process. The terminal device first sends a random access signal. Then the network device detects the random access signal to obtain an optimum uplink transmit beam and receive beam pair, an uplink time, and the like. Finally, uplink synchronization between the network device and the terminal device is implemented.
• This application provides a resource configuration method and an apparatus, to implement resource configuration in a multi-beam network.
• a resource configuration method includes: obtaining, by a terminal device, configuration information, where the configuration information includes at least one piece of the following information: random access configuration information and downlink signal parameter information; and accessing, by the terminal device, a network device based on the configuration information.
• the terminal device determines, based on the random access configuration information and/or the downlink signal parameter information, the random access resource and the random access preamble that are associated with the downlink signal, thereby implementing random access associated with a downlink signal in the multi-beam network.
• the network device in a non-contention based access mode, can designate a configuration of random access associated with a downlink signal.
• the transmit power for sending the random access preamble by the terminal device can be determined based on the foregoing parameters, so that the transmit power for sending the random access preamble matches the maximum quantity of tried beams, the quantity of times of sending the preamble, and the maximum quantity of transmissions allowable within the time of the random access resources associated with the downlink signal burst set.
• a resource configuration method includes: sending, by a network device, configuration information to a terminal device, where the configuration information includes at least one piece of the following information: random access configuration information and downlink signal parameter information; and receiving, by the network device, an access request of the terminal device.
• the network device sends the random access configuration information and/or the downlink signal parameter information to the terminal device, and the terminal device may access a network based on the configuration information.
• the network device sends the random access configuration information and/or the downlink signal parameter information to the terminal device, and the terminal device may access a network based on the configuration information.
• the random access configuration information includes a start time, duration, and an end time of random access, where the time is at least one of the following: a subframe, a slot, a mini-slot, an orthogonal frequency division multiplexing OFDM symbol, and a random access resource index.
• a random access configuration includes a time configuration and a frequency configuration of a random access resource, and the random access resource is associated with a downlink signal in terms of time and frequency.
• the downlink signal parameter information includes at least one piece of the following information: a quantity of downlink signal bursts in a downlink signal burst set and a quantity of downlink signals in each downlink signal burst.
• the downlink signal burst set may include one or more downlink signal bursts, and each downlink signal burst may further include one or more downlink signals.
• Configuring this information, in combination with the random access configuration information Each random access resource can be associated with each downlink signal with reference to the random access configuration information by configuring the information.
• the information is configured in the downlink signal parameter information.
• the random access configuration information further includes at least one piece of the following information: an association relationship between downlink signals and random access resources, and a quantity of random access resources associated with each downlink signal burst.
• the downlink signal burst set may include one or more downlink signal bursts, and each downlink signal burst may further include one or more downlink signals.
• Each random access resource can be associated with each downlink signal with reference to the random access configuration information by configuring the information.
• the information is configured in the random access configuration information.
• the configuration information further includes at least one piece of the following information: an association relationship between downlink signals and random access resources, and a quantity of random access resources associated with each downlink signal burst.
• the downlink signal burst set may include one or more downlink signal bursts, and each downlink signal burst may further include one or more downlink signals.
• Each random access resource can be associated with each downlink signal with reference to the random access configuration information by configuring the information.
• the information is configured in the configuration information.
• the association relationship between downlink signals and random access resources, and the quantity of random access resources associated with each downlink signal burst can be configured.
• Each random access resource can be associated with each downlink signal based on the association relationship between downlink signals and random access resources, and the quantity of random access resources associated with each downlink signal burst.
• the association relationship between downlink signals and random access resources is determined based on at least one of the following parameters: downlink signal indexes, random access resource indexes, the quantity of downlink signals in each downlink signal burst, and the quantity of random access resources associated with each downlink signal burst.
• the association relationship between downlink signals and random access resources can be determined by using these parameters, so that each random access resource can be associated with each downlink signal.
• the association relationship between downlink signals and random access resources includes an association relationship between an index of each downlink signal and an index of each random access resource.
• the association relationship between downlink signals and random access resources can be determined based on the association relationship between indexes of the downlink signals and indexes of the random access resources, so that each random access resource can be associated with each downlink signal.
• the association relationship between downlink signals and random access resources is determined based on the following parameters: offsets of indexes of the random access resources associated with each downlink signal burst, and the quantity of random access resources associated with each downlink signal burst.
• the association relationship between downlink signals and random access resources can be determined by using these parameters, so that each random access resource can be associated with each downlink signal.
• the downlink signal parameter information includes at least one piece of the following information: a total quantity of random access resources associated with the downlink signal burst set, downlink signal indexes, indexes of random access resources associated with downlink signals, and a quantity of random access resources associated with downlink signals.
• each random access resource can be associated with each downlink signal with reference to the random access configuration information by configuring the information.
• the information is configured in the downlink signal parameter information.
• the downlink signal is a synchronization signal block SS block.
• the terminal device includes: an obtaining unit, configured to obtain configuration information, where the configuration information includes at least one piece of the following information: random access configuration information and downlink signal parameter information; and an access unit, configured to access a network device based on the configuration information.
• the terminal device includes a receiver, a transmitter, a memory, and a processor.
• the memory stores a set of program code
• the processor is configured to invoke the program code stored in the memory, to perform the following operations: obtaining configuration information, where the configuration information includes at least one piece of the following information: random access configuration information and downlink signal parameter information; and accessing a network device based on the configuration information.
• the network device receives an access request of the terminal device specifically includes the following: The network device receives the random access preamble that is sent by the terminal device on the random access resource associated with the downlink signal.
• the random access configuration information is specifically a configuration of random an access resource.
• the random access resource may also be understood as a random access occasion (RACH occasion/RACH transmission occasion/RACH opportunity/RACH chance) of one or more random access channels (Random Access Channel, RACH).
• RACH occasion/RACH transmission occasion/RACH opportunity/RACH chance Random Access Channel
• One random access preamble format may be sent on one random access occasion, one random access burst RACH burst may include at least one random access occasion, and one random access burst set RACH burst set may include at least one random access burst group.
• One downlink signal burst set is associated with one random access burst set, one downlink signal burst is associated with one random access burst, and the random access burst set is a random access time period. Detailed descriptions are provided below.
• the configuration information may be prestored in the terminal device or a third-party storage device (the third-party storage device is a device other than the terminal device and the network device).
• the terminal device obtains the configuration information from a memory of the terminal device or the third-party storage device; or the terminal device may receive the configuration information sent from the network device.
• the network device sends a plurality of downlink signals to perform downlink synchronization, and each downlink signal is associated with an independent random access resource. Therefore, the configuration information may further include parameter information of the plurality of downlink signals. Detailed descriptions are also provided below.
• a structure of a random access resource may be as follows.
• FIG. 7 is a schematic structural diagram of random access resources.
• M contiguous time units which may be subframes, slots, mini-slots (mini slot), or orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbols
• K random access resources there are K random access resources, and each random access resource (or RACH occasion) may be used by the terminal device to initiate one time of random access.
• Quantities of random access resources may be the same at different frequencies (in FIG. 7 , there are K random access resources at each of frequencies 1 to F).
• quantities of random access resources may be different at different frequencies. For example, if correspondingly used random access preamble formats are different, corresponding resource time lengths are different, and therefore different quantities of random access resources are accommodated in a same time.
• FIG. 8b is a schematic structural diagram of random access preambles on N random access resources.
• the N random access resources include K random access preambles, and downlink data and uplink data each may include 0 to 12 OFDM symbols.
• a time length of a guard time 1 may be 0.
• T 1 to 64
• N 1 to 64
• K N*(1 to 14)
• a length of a cyclic prefix of the random access preamble is 32*(1 to 512) sampling Ts.
• the random access configuration (RACH configuration/allocation) information includes a start time, duration, and an end time of random access.
• a time unit may be at least one of the following: a subframe, a slot, a mini-slot, an OFDM symbol, or and a random access resource index.
• the start time represents a start location of one or more random access resources in a time period.
• the duration represents a time in which one or more random access resources are located, and the end time represents an end location of one or more random access resources a time period.
• a slot number may be taken from 1 to K, and K is an integer.
• K represents a total quantity of slots in one subframe, and a value of K is 2 to 64.
• a quantity of contiguous subframes on a physical random access channel (Physical Random Access Channel, PRACH) may be 1 to 4.
• PRACH Physical Random Access Channel
• this parameter may be obtained based on a preamble format without being indicated.
• a quantity of contiguous slots on the PRACH may be 1 to K, and K is an integer.
• K represents a total quantity of slots in one subframe, and a value of K is 2 to 64.
• This parameter may also be obtained based on a preamble format without being indicated; or this parameter may be fixedly any one of 2, 4, 8, 16, and 32.
• the random access configuration information includes at least one of the following: a PRACH configuration index, a preamble format, a system frame number (System Frame Number, SFN), a subframe number, a quantity of random access resources, a frequency quantity, a frequency start location, a frequency offset, a timing advance, random access preamble grouping information, and a subcarrier spacing.
• the system frame number may be a value that makes Mod(SFN, N) a constant.
• N is 2, and an odd-numbered frame and an even-numbered frame may be indicated.
• N is 4 to 16, and N system frame locations may be specified.
• the quantity of random access resources is a quantity of random access resources included in a subframe or a slot. This parameter may not need to be indicated, for example, the quantity is fixed; or this parameter is obtained based on a preamble format, a quantity of contiguous subframes, or a quantity of contiguous slots.
• This parameter may not need to be indicated, either.
• the parameter is fixedly 1.
• the frequency start location may be any nonnegative integer, and represents a frequency location of the first resource block in which a random access resource is located at a frequency.
• the frequency offset may be any nonnegative integer, and a specific frequency location of the random access resource may be determined based on the frequency offset and the frequency start location. This parameter may not need to be indicated, either.
• the offset is fixedly 0.
• the timing advance may be any nonnegative integer, and represents an advance of time relative to a subframe, a slot, a mini-slot, or an OFDM symbol during random access transmission. This parameter may not need to be indicated, either. For example, the timing advance is fixedly 0.
• the timing advance is fixedly 0.
• the random access configuration information may further include at least one of the following: a quantity of downlink data symbols and a quantity of uplink data symbols.
• a quantity of downlink data symbols and a quantity of downlink data symbols on a PRACH resource each may be 0 to 13 OFDM symbols. This parameter may not need to be indicated, either. For example, the quantity is fixed, or this parameter is obtained based on a preamble format, a quantity of contiguous subframes, or a quantity of contiguous slots.
• the random access configuration information may include the following possible cases, as shown in Table 1 to Table 3.
• indexes of a subframe, a slot, a mini-slot, an OFDM symbol, and a random access resource may be respectively numbers of the subframe, the slot, the mini-slot, the OFDM symbol, and the random access resource.
• the random access configuration information may include the information in at least one of Table 1 to Table 3.
• the quantity of random access resources may be obtained based on a preamble format, the quantity of contiguous subframes, the quantity of contiguous slots, a quantity of contiguous mini-slots, and the quantity of contiguous OFDM symbols. Therefore, the information, namely, the quantity of random access resources, may not be mandatory.
• the subframe number and the quantity of contiguous subframes, a slot number and the quantity of contiguous slots, a mini-slot number and a quantity of contiguous mini-slots, and the OFDM symbol and the quantity of contiguous OFDM symbols may be respectively represented by a subframe number set, a slot number set, a mini-slot number set, and an OFDM symbol number set.
• an uplink/downlink configuration index parameter may be further added to the random access configuration information, and a subframe number-related configuration parameter is a tuple.
• the terminal device needs to determine a location of an uplink subframe in a system frame and a specific subframe number based on an uplink/downlink configuration and a subframe number-related configuration. The reason for using such a configuration is that the location of the uplink subframe may change, and therefore it is only feasible to use a parameter to indicate a relative location of the uplink subframe during random access, and a specific subframe number is determined based on the uplink subframe configuration and the relative location.
• the downlink signal parameter information includes at least one piece of the following information: a quantity of downlink signal bursts in a downlink signal burst set and a quantity of downlink signals in each downlink signal burst, as described in Table 4.
• a total quantity of downlink signals in the downlink signal burst set may be obtained based on the quantity of downlink signals in each downlink signal burst.
• the random access configuration information further includes at least one piece of the following information: an association relationship between downlink signals and random access resources, and a quantity of random access resources associated with each downlink signal burst.
• the configuration information further includes at least one piece of the following information: an association relationship between downlink signals and random access resources, and a quantity of random access resources associated with each downlink signal burst.
• the downlink signal parameter information further includes at least one piece of the following information: the association relationship between downlink signals and random access resources, and a quantity of random access resources associated with each downlink signal burst.
• a quantity of downlink signals in another downlink signal burst is configured by using the downlink signal parameter information.
• the table may be searched, based on the downlink signal parameter information configuration, for the quantity of downlink signal bursts in the downlink signal burst set and the quantity of downlink signals included in each downlink signal burst set.
• a quantity of random access resources associated with another downlink signal burst is configured by using the downlink signal parameter information.
• the table may be searched, based on the downlink signal parameter information configuration, for the quantity of random access resources associated with each downlink signal burst.
• the random access configuration information includes the downlink signal parameter information and/or an association between downlink signals and random access resources.
• a total time length T RA of the random access resources associated with the downlink signal burst set may also be obtained ( T RA is a time period corresponding to the associated random access resources).
• the association relationship between downlink signals and random access resources may be determined based on at least one of the following parameters: downlink signal indexes, random access resource indexes, the quantity of downlink signals in each downlink signal burst, and the quantity of random access resources associated with each downlink signal burst.
• the association relationship between downlink signals and random access resources may be a correspondence between designated downlink signal indexes i and random access resource indexes r.
• Time and frequency locations and a preamble of a random access resource can be correspondingly determined based on a correspondence between a logical downlink signal index and a random access resource index, and start location information of the random access resource.
• a start location of random access resources is the m th random access resource in a system frame SFN by default, and m is indicated using system information.
• m does not need to be indicated.
• the network side sends, to the terminal device, the quantity of downlink signal groups, the quantity of downlink signals in each downlink signal group, the quantity of random access resources associated with each downlink signal group (or the total quantity of downlink signal in the downlink signal burst set), the start location of the random access resources, and a method for associating a random access resource with a downlink signal.
• the terminal device side obtains the total quantity of random access resources associated with the downlink signal burst set and the specific location corresponding to each random access resource, based on the quantity of downlink signal bursts, the quantity of downlink signals in each downlink signal burst, the quantity of random access resources associated with each downlink signal burst (and/or the total quantity of downlink signals in the downlink signal burst set), and the random access configuration information.
• the terminal device may further determine a period T RA corresponding to the random access resource, and specific time and frequency locations of each random access resource in the time period; and then obtain, according to the method for associating random access resources and based on an index of a downlink signal, time and frequency locations and a preamble of a random access resource associated with the downlink signal.
• FIG. 9a is a schematic structural diagram of random access resources in an example random access configuration.
• Subframes 1, 4, and 7 in a system frame each include four random access resources.
• a random access burst set of a network includes eight downlink signals. The eight downlink signals are divided into two downlink signal bursts, and each downlink signal burst includes four downlink signals. Each random downlink signal in a first downlink signal burst is associated with two random access resources, and each random downlink signal in a second downlink signal burst is associated with one random access resource.
• a start location of the random access resources is 0, and a correspondence between logical indexes is described in Formula (1).
• the association relationship between downlink signals and random access resources is determined based on the following parameters: offsets ⁇ k , j of indexes of random access resources j associated with each downlink signal burst k, and the quantity of random access resources associated with each downlink signal burst.
• the association relationship between downlink signals and random access resources is determined based on the following parameters: offsets ⁇ k,j of indexes of random access resources j associated with each downlink signal burst k, and the quantity of random access resources associated with each downlink signal burst.
• FIG. 12a shows a random access resource in an example random access configuration.
• Subframes 1 and 6 in a system frame each include eight random access resources.
• a random access burst set of a network includes eight downlink signals, which are included in one downlink signal burst. In other words, one downlink signal burst includes eight downlink signals.
• Each downlink signal in the downlink signal burst is associated with two random access resources, and a start location of the random access resources is 0.
• ⁇ k,j is an offset.
• a time period T RA 10ms of random access resources associated with a downlink signal burst set may be obtained based on the foregoing configuration, and locations of random access resources associated with the downlink signals are shown in FIG. 12b .
• an index i of a downlink signal may be represented as a combination of an index k of a downlink signal burst, and an index m of the downlink signal in the downlink signal burst k.
• downlink signal indexes may be numbers of all downlink signals in the downlink signal burst set, or a downlink signal index may be represented by two levels of indexes: and index of a downlink signal burst and an index of a downlink signal in the downlink signal burst.
• the downlink signal parameter information includes at least one piece of the following information: a total quantity of random access resources associated with a downlink signal burst set, downlink signal indexes, indexes of random access resources associated with downlink signals, and a quantity of random access resources associated with downlink signals.
• the downlink signal parameter information is specifically described in Table 5.
• Table 5 Example 2 of the downlink signal parameter information Parameter name Parameter value NRO Total quantity of random access resources associated with a downlink signal burst set k Downlink signal index ⁇ r 1 , r 2 , ... , r blk ⁇ Indexes of random access resources associated with downlink signals k
• a total time length T RA of the random access resources associated with the downlink signal burst set may be obtained ( T RA is a time period corresponding to the associated random access resources).
• a total quantity of random access resources within 10 ms or 5 ms is an integral multiple of the total quantity of random access resources associated with the downlink signal burst set.
• a start location of random access resources is the m th random access resource in a system frame SFN by default, and m is indicated using system information.
• m does not need to be indicated.
• the network device side sends the total quantity of downlink signals in the downlink signal burst set, the downlink signal indexes, and the indexes of random access resources corresponding to downlink signals, and the start location of random access resources.
• the terminal device side receives the total quantity of random access resources associated with the downlink signal burst set and the random access configuration information, and determines the period T RA corresponding to the random access resources, and specific time and the frequency locations of each random access resource in the time period. Then the terminal device obtains time and frequency locations and a preamble of a random access resource associated with a downlink signal, based on an index of the downlink signal, an index of the random access resource corresponding to the downlink signal, and the start location of random access resources.
• the period T RA may be sent using system information.
• the method further includes the following: The terminal device receives at least one piece of the following information from the network device: an index of the random access preamble, an index of the downlink signal, random access resources associated with downlink signals in a downlink signal burst set, a random access time period (for example, the N th period T RA ), and a total quantity of random access resources associated with downlink signals in a downlink signal burst set (this is described from a perspective of a quantity of discrete random access resources, can achieve same effects as the T RA method).
• This implementation is a resource configuration manner in a non-contention mode, and the network device directly designates a random access resource associated with a downlink signal.
• the downlink signal may be a synchronization signal block (SS block).
• the index of the downlink signal may be an index of the synchronization signal block.
• a transmit power for sending the random access preamble by the terminal device is related to at least one of the following parameters: a maximum quantity of tried beams, a quantity of times of sending the random access preamble by the terminal device, and a maximum quantity of transmissions allowable within a time of random access resources associated with a downlink signal burst set, where the quantity of times of sending the random access preamble is less than or equal to a maximum quantity of preamble transmissions.
• a preamble transmission counter PREAMBLE_TRANSMISSION_COUNTER is increased by 1.
• the preamble transmit power is related to the preamble transmission counter and the maximum quantity of transmissions preambleSetMax allowable within the total time length of the random access resources associated with the downlink signal burst set.
• a target transmission power may be: preambleInitialReceivedTargetPower +DELTA_PREAMBLE+(floor(PRE AMBLE_TRANSMISSION_COUNTER/preambleSetMax)-1)*powerRampingStep,
• the PREAMBLE_TRANSMISSION_COUNTER is related only to T RA .
• the PREAMBLE_TRANSMISSION_COUNTER is 1 in the first T RA in which the random access preamble is sent
• the PREAMBLE_TRANSMISSION_COUNTER is 2 in the second T RA in which the random access preamble is sent
• PREAMBLE_TRANSMISSION_COUNTER is k in the k th T RA in which the random access preamble is sent.
• the preamble transmit power is related to at least one of the preamble transmission counter PREAMBLE_TRANSMISSION_COUNTER, the maximum quantity of transmissions preambleSetMax allowable within the total time length of the random access resources associated with the downlink signal burst set, and the UEbeamMax.
• the preamble transmit power may be: preambleInitialReceivedTargetPower +DELTA_PREAMBLE+(floor(PRE AMBLE_TRANSMISSION_COUNTER/preambleSetMax/UEbeamMax)- 1)*powerRampingStep.
• the terminal device tries N different transmit beams, and N ⁇ 2.
• the terminal device first tries one transmit beam, and then changes to another transmit beam.
• the network device may also designate a weighting coefficient powerRampingScale(i) of a power ramping factor corresponding to a transmit beam i, to accelerate power ramping when there are a relatively large quantity of beams, where powerRampingScale(i) may be a nonnegative real number.
• the transmit beam may be used to send a downlink signal, for example, send a reference signal.
• the reference signal is a channel state information-reference signal (channel state information-reference signal, CSI-RS), a demodulation reference signal (demodulation reference signal, DMRS), or a phase-tracking reference signal (phase-tracking reference signal, PTRS).
• FIG. 13 is a schematic modular diagram of a terminal device according to an embodiment of the present invention.
• the terminal device 1000 may include an obtaining unit 11 and an access unit 12.
• the obtaining unit 11 is configured to perform an operation of obtaining configuration information, for example, performing S101.
• the access unit 12 is configured to communicate with a network device, for example, performing S102.
• a network device for example, performing S102.
• a simple resource configuration solution is provided for a multi-beam network, thereby implementing random access associated with a downlink signal in the multi-beam network.
• FIG. 14 is a schematic modular diagram of a network device according to an embodiment of the present invention.
• the network device 2000 may include a sending unit 21 and a receiving unit 22.
• the sending unit 21 is configured to perform a downlink operation with a terminal device, for example, sending configuration information to the terminal device, to correspond to S101.
• the receiving unit 22 is configured to perform an uplink operation with the terminal device, for example, receiving an access request of the terminal device, to correspond to S102.
• a simple resource configuration solution is provided for a multi-beam network, thereby implementing random access associated with a downlink signal in the multi-beam network.
• An embodiment of the present invention further provides a terminal device.
• the terminal device may be the terminal device in the foregoing communications system, and the terminal device may have a hardware architecture shown in FIG. 15 .
• the terminal device may include a receiver, a transmitter, a memory, and a processor.
• the receiver, the transmitter, the memory, and the processor are connected to each other through a bus.
• the transmitter may be used to implement related functions implemented by the access unit 12 or the obtaining unit in FIG. 13 or a sending unit, and the receiver may be used to implement related functions implemented by a receiving unit.
• the receiver is configured to receive data and/or a signal
• the transmitter is configured to send data and/or a signal.
• the transmitter and the receiver may be independent components, or may be an integrated component, for example, a transceiver.
• the processor may include one or more processors, for example, include one or more central processing units (Central Processing Unit, CPU).
• CPU Central Processing Unit
• the processor may be a single-core CPU or a multi-core CPU.
• the memory is configured to store program code and data of the terminal device, and may be an independent component or may be integrated into the processor.
• the components may be integrated into a chip for implementation, for example, integrated into a baseband chip for implementation.
• the processor is configured to perform an operation of obtaining configuration information, for example, performing S101; and the transmitter is configured to communicate with a network device, for example, performing S102.
• FIG. 15 shows merely a simplified design of the terminal device.
• the terminal device may further include another necessary element, including but not limited to any quantity of transceivers, processors, controllers, and memories. All terminal devices that can implement the embodiments of the present invention fall within the protection scope of the present invention.
• a simple resource configuration solution is provided for a multi-beam network, thereby implementing random access associated with a downlink signal in the multi-beam network.
• An embodiment of the present invention further provides a network device.
• the network device may be the network device in the foregoing communications system, and the network device may have a hardware architecture shown in FIG. 15 .
• the network device may include a receiver, a transmitter, a memory, and a processor.
• the receiver, the transmitter, the memory, and the processor are connected to each other through a bus.
• the receiver may be used to implement related functions implemented by the receiving unit 22 in FIG. 14
• the transmitter may be used to implement related functions implemented by the sending unit 21.
• the receiver is configured to receive data and/or a signal
• the transmitter is configured to send data and/or a signal.
• the transmitter and the receiver may be independent components, or may be an integrated component, for example, a transceiver.
• the processor may include one or more processors, for example, include one or more CPUs.
• the processor may be one CPU, the CPU may be a single-core CPU or a multi-core CPU.
• the memory is configured to store program code and data of the network device, and may be an independent component or may be integrated into the processor.
• the components may be integrated into a chip for implementation, for example, integrated into a baseband chip for implementation.
• the transmitter is configured to perform a downlink operation with a terminal device, for example, sending configuration information to the terminal device, to correspond to S101; and the receiver is configured to perform an uplink operation with the terminal device, for example, receiving an access request of the terminal device, to correspond to S102.
• a terminal device for example, sending configuration information to the terminal device, to correspond to S101
• the receiver is configured to perform an uplink operation with the terminal device, for example, receiving an access request of the terminal device, to correspond to S102.
• FIG. 15 shows merely a simplified design of the network device.
• the network device may further include another necessary element, including but not limited to any quantity of transceivers, processors, controllers, and memories. All network devices that can implement the present invention fall within the protection scope of the present invention.
• a simple resource configuration solution is provided for a multi-beam network, thereby implementing random access associated with a downlink signal in the multi-beam network.
• the units described as separate parts may or may not be physically separate. Parts displayed as units may or may not be physical units, and may be located in one position or distributed on a plurality of network units. Some or all of the units may be selected according to actual requirements to achieve the objectives of the solutions of the embodiments.
• functional units in the embodiments of this application may be integrated into one processing unit, or each of the units may exist alone physically, or two or more units are integrated into one unit.
• All or some of the foregoing embodiments may be implemented by using software, hardware, firmware, or any combination thereof.
• the embodiments may be implemented completely or partially in a form of a computer program product.
• the computer program product includes one or more computer instructions.
• the computer program instructions When the computer program instructions are loaded and executed on a computer, the procedures or functions according to the embodiments of the present invention are all or partially generated.
• the computer may be a general purpose computer, a dedicated computer, a computer network, or another programmable apparatus.
• the computer instructions may be stored in a computer-readable storage medium, or may be transmitted by using a computer-readable storage medium.
• the computer instructions may be transmitted from a website, computer, server, or data center to another website, computer, server, or data center in a wired (for example, a coaxial cable, an optical fiber, or a digital subscriber line (DSL)) or wireless (for example, infrared, radio, or microwave) manner.
• the computer-readable storage medium may be any usable medium accessible by a computer, or a data storage device, such as a server or a data center, integrating one or more usable media.
• the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium (for example, a DVD), a semiconductor medium (for example, a solid state drive (Solid State Disk, SSD)), or the like.
• a magnetic medium for example, a floppy disk, a hard disk, or a magnetic tape
• an optical medium for example, a DVD
• a semiconductor medium for example, a solid state drive (Solid State Disk, SSD)
• Embodiment 1 A resource configuration method, wherein the method comprises: obtaining, by a terminal device, configuration information, wherein the configuration information comprises one or more pieces of the following information:
• Embodiment 2 The method according to embodiment 1, wherein the accessing, by the terminal device, a network device based on the configuration information specifically comprises:
• Embodiment 3 The method according to embodiment 1 or 2, wherein the method further comprises: receiving, by the terminal device, one or more pieces of the following information from the network device: an index of the random access preamble, an index of the downlink signal, random access resources associated with downlink signals in a downlink signal burst set, a random access time period, and a total quantity of random access resources associated with downlink signals in a downlink signal burst set.
• Embodiment 4 The method according to embodiment 2, wherein a transmit power for sending the random access preamble by the terminal device is related to one or more of the following parameters: a maximum quantity of tried beams, a quantity of times of sending the random access preamble by the terminal device, and a maximum quantity of transmissions allowable within a time of random access resources associated with a downlink signal burst set, wherein the quantity of times of sending the random access preamble is less than or equal to a maximum quantity of preamble transmissions.
• Embodiment 5 The method according to any one of embodiments 1 to 4, further comprising: determining, based on the random access configuration information and the downlink signal parameter information, a length of a time period for mapping a downlink signal onto a random access resource.
• Embodiment 7 The method according to embodiment 6, wherein the receiving, by the network device, an access request of the terminal device specifically comprises: receiving, by the network device, a random access preamble that is sent by the terminal device on a random access resource associated with a downlink signal.
• Embodiment 8 The method according to embodiment 6 or 7, further comprising: determining, based on the random access configuration information and the downlink signal parameter information, a length of a time period for mapping a downlink signal onto a random access resource.
• Embodiment 9 The method according to any one of embodiments 1 to 8, wherein the random access configuration information comprises one or more pieces of the following information:
• Embodiment 10 The method according to any one of embodiments 1 to 9, wherein the downlink signal parameter information comprises one or more pieces of the following information: a quantity of downlink signal bursts in a downlink signal burst set and a quantity of downlink signals in each downlink signal burst.
• Embodiment 11 The method according to any one of embodiments 1 to 10, wherein the random access configuration information further comprises one or more pieces of the following information: an association relationship between downlink signals and random access resources, and a quantity of random access resources associated with each downlink signal burst.
• Embodiment 12 The method according to any one of embodiments 1 to 10, wherein the configuration information further comprises one or more pieces of the following information: an association relationship between downlink signals and random access resources, and a quantity of random access resources associated with each downlink signal burst.
• Embodiment 13 The method according to any one of embodiments 1 to 10, wherein the downlink signal parameter information further comprises one or more pieces of the following information: an association relationship between downlink signals and random access resources, and a quantity of random access resources associated with each downlink signal burst.
• Embodiment 14 The method according to any one of embodiments 11 to 13, wherein the association relationship between downlink signals and random access resources is determined based on one or more of the following parameters: downlink signal indexes, random access resource indexes, the quantity of downlink signals in each downlink signal burst, and the quantity of random access resources associated with each downlink signal burst.
• Embodiment 15 The method according to embodiment 14, wherein the association relationship between downlink signals and random access resources comprises: an association relationship between an index of each downlink signal and an index of each random access resource.
• Embodiment 16 The method according to embodiment 14, wherein the association relationship between downlink signals and random access resources is determined based on the following parameters: offsets of indexes of the random access resources associated with each downlink signal burst, and the quantity of random access resources associated with each downlink signal burst.
• Embodiment 17 The method according to any one of embodiments 1 to 9, wherein the downlink signal parameter information comprises one or more pieces of the following information: a total quantity of random access resources associated with the downlink signal burst set, indexes of the downlink signal, indexes of random access resources associated with the downlink signals, and a quantity of random access resources associated with the downlink signals.
• Embodiment 18 The method according to any one of embodiments 9 to 17, further comprising: obtaining, by the terminal device, the total quantity of random access resources associated with the downlink signal burst set and a specific location corresponding to each of the random access resources, based on the random access configuration information, the quantity of downlink signal bursts in the downlink signal burst set, the quantity of downlink signals in each downlink signal burst, the association relationship between downlink signals and random access resources, and the quantity of random access resources associated with each downlink signal burst.
• Embodiment 19 The method according to embodiment 18, wherein the determining, by the terminal device based on the configuration information, a random access resource and a random access preamble that are associated with a downlink signal further comprises:
• Embodiment 20 The method according to any one of embodiments 1 to 19, wherein the random access configuration information comprises one or more of the following: a system frame location of a random access resource, a start OFDM symbol location of a subframe in which the random access resource is located, and a start OFDM symbol location of a slot in which the random access resource is located, wherein the system frame location comprises one or more of the following:
• Embodiment 21 The method according to embodiment 5 or 8, wherein the length of the time period for mapping downlink signals onto random access resources is one or more of the following: 10 ms, 20 ms, 40 ms, 80 ms, 160 ms, and 320 ms.
• Embodiment 22 The method according to embodiment 5 or 8, wherein a start time of the time period for mapping downlink signals onto random access resources is a system frame 0.
• Embodiment 24 The method according to any one of embodiments 1 to 23, wherein the downlink signal is a synchronization signal block.
• a terminal device comprising:
• Embodiment 26 The terminal device according to embodiment 25, wherein the access unit specifically comprises:
• Embodiment 27 The terminal device according to embodiment 26, wherein a transmit power for sending the random access preamble is related to one or more of the following parameters: a maximum quantity of tried beams, a quantity of times of sending the random access preamble by the terminal device, and a maximum quantity of transmissions allowable within a time of random access resources associated with a downlink signal burst set, wherein the quantity of times of sending the random access preamble is less than or equal to a maximum quantity of preamble transmissions.
• Embodiment 28 The terminal device according to embodiment 25, wherein the determining unit is further configured to determine, based on the random access configuration information and the downlink signal parameter information, a length of a time period for mapping a downlink signal onto a random access resource.
• Embodiment 29 The terminal device according to embodiment 28, wherein the length of the time period for mapping downlink signals onto random access resources is one or more of the following: 10 ms, 20 ms, 40 ms, 80 ms, 160 ms, and 320 ms.
• Embodiment 31 The terminal device according to any one of embodiments 25 to 30, wherein the random access configuration information comprises one or more pieces of the following information:
• Embodiment 32 The terminal device according to any one of embodiments 25 to 31, wherein the downlink signal parameter information comprises one or more pieces of the following information: a quantity of downlink signal bursts in a downlink signal burst set and a quantity of downlink signals in each downlink signal burst.
• Embodiment 33 The terminal device according to any one of embodiments 25 to 32, wherein the downlink signal parameter information further comprises one or more pieces of the following information: an association relationship between downlink signals and random access resources, and a quantity of random access resources associated with each downlink signal burst.
• Embodiment 34 The terminal device according to any one of embodiments 25 to 33, wherein the association relationship between downlink signals and random access resources is determined based on one or more of the following parameters: indexes of the downlink signal, indexes of the random access resource, the quantity of downlink signals in each downlink signal burst, and the quantity of random access resources associated with each downlink signal burst.
• Embodiment 35 The terminal device according to embodiment 34, wherein the association relationship between downlink signals and random access resources comprises: an association relationship between an index of each downlink signal and an index of each random access resource.
• Embodiment 36 The terminal device according to embodiment 34, wherein the association relationship between downlink signals and random access resources is determined based on the following parameters: offsets of indexes of the random access resources associated with each downlink signal burst, and the quantity of random access resources associated with each downlink signal burst.
• Embodiment 39 The terminal device according to embodiment 38, wherein the determining, by the terminal device based on the configuration information, a random access resource and a random access preamble that are associated with a downlink signal further comprises:
• Embodiment 40 The terminal device according to embodiment 25 or 39, wherein the random access configuration information comprises one or more of the following: a system frame location of a random access resource, a start OFDM symbol location of a subframe in which the random access resource is located, and a start OFDM symbol location of a slot in which the random access resource is located, wherein the system frame location comprises one or more of the following:
• Embodiment 43 A network device, comprising:
• Embodiment 44 The network device according to embodiment 43, wherein the receiving unit is configured to receive a random access preamble that is sent by the terminal device on a random access resource associated with a downlink signal.
• Embodiment 46 The network device according to any one of embodiments 43 to 45, wherein non-contention based random access configuration information comprises one or more of the following: random access preamble indexes, downlink signal indexes, random access resources associated with downlink signals, a random access time period, and a total quantity of random access resources associated with downlink signals in a downlink signal burst set.
• Embodiment 47 The network device according to any one of embodiments 43 to 46, wherein the downlink signal is a synchronization signal block.
• Embodiment 48 A communications chip, wherein the communications chip stores an instruction, and when the communications chip is run on a communications device, a computer is enabled to perform the method according to any one of embodiments 1 to 5 and embodiments 9 to 24.
• Embodiment 49 A communications chip, wherein the communications chip stores an instruction, and when the communications chip is run on a communications device, a computer is enabled to perform the method according to any one of embodiments 6 to 8 and embodiments 9 to 24.
• Embodiment 50 A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program or an instruction, and when the computer program or the instruction is executed, the method according to any one of embodiments 1 to 5 and embodiments 9 to 24 is implemented.
• Embodiment 51 A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program or an instruction, and when the computer program or the instruction is executed, the method according to any one of embodiments 6 to 8 and embodiments 9 to 24 is implemented.
• Embodiment 52 A computer program product comprising an instruction, wherein when the computer program product is run on a computer, the computer is enabled to perform the method according to any one of embodiments 1 to 5 and embodiments 9 to 24.
• Embodiment 53 A computer program product comprising an instruction, wherein when the computer program product is run on a computer, the computer is enabled to perform the method according to any one of embodiments 6 to 8 and embodiments 9 to 24.
• At least one means one or more, and "a plurality of " means two or more.
• And/or describes an association relationship between associated objects, and indicates that three relationships may exist. For example, A and/or B may indicate the following three cases: A exists alone, both A and B exist, and B exists alone, where A and B may be singular or plural.
• the character “/” usually indicates an "or” relationship between the associated objects.
• At least one of the following or an expression similar to this indicate any combination of the following, including any combination of one or more of the following.
• At least one of a, b, or c may indicate: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c may be singular or plural.

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• 2017
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